How do you manage humidity when storing large telephoto lenses?

[RedSparrow]

You are very right. Fungal spores are ubiquitous & need a warm & damp environment. Aeration while keeping dust away is the best policy. I have the dubious claim of having a Nikkor 800mm & 500mm lenses but no camera, hence my lenses are resting in my bag awaiting a Z9!

 

[R_Warshaw]

Here in soggy Virginia I use a large dehumidifier with a pump in my cellar. It keeps the whole space at ~40% and protects the books, printss, etc. that I keep there as well. I keep the photo gear on a shelf either in it's cases or covered with a soft cloth to keep out dust.